Dissipative Supramolecular Polymerization Powered by Light

Yin, Zihe; Song, Guobin; Jiao, Yang; Zheng, Peng; Xu, Jiang‐Fei; Zhang, Xi

doi:10.31635/ccschem.019.20190013

Cited by 112 publications

(80 citation statements)

References 52 publications

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“…[20] Besides dynamic covalent bonds, various noncovalent bonds have been used as cross-linking points to construct recyclable networks. [21][22][23][24][25][26][27][28][29][30][31] Compared with dynamic covalent bonds, the binding strength of noncovalent bonds is weaker and therefore noncovalent bonds are more likely to break and reform reversibly under facile conditions without catalysts. [32][33][34][35][36][37][38][39][40][41][42] More importantly, no cleavage and formation of the chemical bonds are involved during the dissociative and associative process of noncovalent bonds, hence there are few side reactions in the exchange process.…”

Section: Doi: 101002/adma202000096mentioning

confidence: 99%

Tough and Multi‐Recyclable Cross‐Linked Supramolecular Polyureas via Incorporating Noncovalent Bonds into Main‐Chains

et al. 2020

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Covalent thermosets generally exhibit robust mechanical properties, while they are fragile and lack the ability to be reprocessed or recycled. Herein, a new strategy of incorporating noncovalent bonds into main‐chains is developed to construct tough and multi‐recyclable cross‐linked supramolecular polyureas (CSPU), which are prepared via the copolymerization of diisocyanate monomers, noncovalently bonded diamine monomers linked by quadruple hydrogen bonds, and covalent diamine/triamine monomers. The CSPU exhibit remarkable solvent resistance and outstanding mechanical properties owing to the covalent cross‐linking via triamine monomer. Through the incorporation of 9.7% and 14.6% quadruple hydrogen bonded diamine monomer, the transparent CSPU films are endowed with superior toughness of 74.17 and 124.17 MJ m−3, respectively. Impressively, even after five generations of recycling processes, the mechanical properties of reprocessed CSPU can recover more than 95% of their original properties, displaying excellent multiple recyclablity. As a result, the superior toughness, remarkable solvent resistance, high transparency, and excellent multiple recyclability are well‐combined in the CSPU. It is highly anticipated that this line of research will provide a facile and general method to construct various cross‐linked polymer materials with superior recyclability and mechanical properties.

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Section: Doi: 101002/adma202000096mentioning

confidence: 99%

Tough and Multi‐Recyclable Cross‐Linked Supramolecular Polyureas via Incorporating Noncovalent Bonds into Main‐Chains

et al. 2020

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“…Supramolecular systems with unique functions can be achieved in combination of the tunable stability of radicals and the supramolecular topological change with the formation of radical dimers. Recently, we reported a light powered dissipative supramolecular polymerization system based on a MVc + dimer stabilized in the cavity of cucurbit [8]uril 85 (Fig. 18).…”

Section: Coordination Bondsmentioning

confidence: 99%

Tuning the stability of organic radicals: from covalent approaches to non-covalent approaches

et al. 2020

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“…[36][37][38][39][40][41] It can be expected that the band gap could be further narrowed through intermolecular charge transfer, which could lead to an absorption in NIR-II biowindow.F urthermore,o rganic radicals usually exhibit good aqueous solubility,w hich contributes to its potential application in biosystems. [42][43][44][45][46][47][48][49][50][51][52][53][54][55] However,p oor stability and undesired side reactions tend to limit the application of organic radicals.I ti st hus interesting to explore whether aNIR-II photothermal therapy agent can be fabricated based on organic radicals with improved stability.…”

Section: Introductionmentioning

confidence: 99%

A Supramolecular Radical Dimer: High‐Efficiency NIR‐II Photothermal Conversion and Therapy

et al. 2019

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Photothermal therapy at the NIR‐II biowindow (1000–1350 nm) is drawing increasing interest because of its large penetration depth and maximum permissible exposure. Now, the supramolecular radical dimer, fabricated by N,N′‐dimethylated dipyridinium thiazolo[5,4‐d]thiazole radical cation (MPT.+) and cucurbit[8]uril (CB[8]), achieves strong absorption at NIR‐II biowindow. The supramolecular radical dimer (2MPT.+‐CB[8]) showed highly efficient photothermal conversion and improved stability, thus contributing to the strong inhibition on HegG2 cancer cell under 1064 nm irradiation even penetrating through chicken breast tissue. This work provides a novel approach to construct NIR‐II chromophore by tailor‐made assembly of organic radicals. It is anticipated that this study provides a new strategy to achieve NIR‐II photothermal therapy and holds promises in luminescence materials, optoelectronic materials, and also biosensing.

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Dissipative Supramolecular Polymerization Powered by Light

Cited by 112 publications

References 52 publications

Tough and Multi‐Recyclable Cross‐Linked Supramolecular Polyureas via Incorporating Noncovalent Bonds into Main‐Chains

Tough and Multi‐Recyclable Cross‐Linked Supramolecular Polyureas via Incorporating Noncovalent Bonds into Main‐Chains

Tuning the stability of organic radicals: from covalent approaches to non-covalent approaches

A Supramolecular Radical Dimer: High‐Efficiency NIR‐II Photothermal Conversion and Therapy

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